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timer: create timer_quiesce_cpu() to isolate CPU from timers

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To isolate CPUs (isolate from timers) from sysfs using cpusets, we need some
support from the timer core. i.e. A routine timer_quiesce_cpu() which would
migrates away all the unpinned timers, but shouldn't touch the pinned ones.

This patch creates this routine.

Change-Id: I4795aeffd1be41830ac295a1e2e8f36fb05e98b7
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
[forward port to 3.18]
Signed-off-by: Santosh Shukla <santosh.shukla@linaro.org>
[ohaugan@codeaurora.org: Port to 4.4. Fixes for compilation error]
Git-commit: 313910b70ea0c73f8789d9189c11e1f339080646
Git-repo: git://git.linaro.org/people/mike.holmes/santosh.shukla/lng-isol.git
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
[rameezmustafa@codeaurora.org: Port to msm-4.9 and rebase to change
					patch dependency order.]
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
[markivx: Port to 4.14, fix merge conflicts]
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
[satyap@codeaurora.org: Port to 4.19 and resolve trivial merge conflicts]
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
This commit is contained in:
Viresh Kumar
2015-03-25 11:47:53 +05:30
committed by Satya Durga Srinivasu Prabhala
parent f41050307f
commit d205b84171
2 changed files with 25 additions and 10 deletions
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3
include/linux/timer.h
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@@ -182,6 +182,9 @@ extern bool check_pending_deferrable_timers(int cpu);
*/
#define NEXT_TIMER_MAX_DELTA ((1UL << 30) - 1)
/* To be used from cpusets, only */
extern void timer_quiesce_cpu(void *cpup);
extern void add_timer(struct timer_list *timer);
extern int try_to_del_timer_sync(struct timer_list *timer);